/*******************************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ai.platon.pulsar.persist.metadata

interface CrawlStatusCodes {
    companion object {
        /**
         * Page was not fetched yet.
         */
        const val UNFETCHED: Byte = 0x01
        /**
         * Page was successfully fetched.
         */
        const val FETCHED: Byte = 0x02
        /**
         * Page no longer exists.
         */
        const val GONE: Byte = 0x03
        /**
         * Page temporarily redirects to other page.
         */
        const val REDIR_TEMP: Byte = 0x04
        /**
         * Page permanently redirects to other page.
         */
        const val REDIR_PERM: Byte = 0x05
        /**
         * Fetching unsuccessful, needs to be retried (transient errors).
         */
        const val RETRY: Byte = 0x22
        /**
         * Fetching successful - page is not modified.
         */
        const val NOTMODIFIED: Byte = 0x26
    }
}
